Ko te hydroxyethyl cellulose he matūriki waenga ki te teitei o te cellulose ether, e whakamahia ana hei whakamātotoru me te whakau mō ngā paninga wai-hāngai, inā koa he teitei te matūriki rokiroki me te iti te matūriki tono. He ngāwari te whakamarara i te cellulose ether ki te wai matao me te uara pH ≤ 7, engari he ngāwari te whakakotahi ki te wai kawakore me te uara pH ≥ 7.5, nō reira me aro tātou ki te whakamarara o te cellulose ether.
Ngā āhuatanga me ngā whakamahinga o te hydroxyethyl cellulose:
1. He whakamātotoru wai kore-ionic ārai-enzyme, ka taea te whakamahi i roto i te whānuitanga o te uara pH (PH=2-12).
2. He māmā ki te whakamarara, ka taea te tāpiri tika hei paura maroke, hei parai rānei ina huri ana i ngā tae me ngā whakakī.
3. He hanganga tino pai. He pai ki te penapena mahi, kāore e ngāwari ki te maturuturu me te iri, ā, he pai hoki te ātete ki te tauhiuhi.
4. He pai te hototahi ki ngā momo matū horoi me ngā matū tiaki e whakamahia ana i roto i te peita rapa.
5. He pumau te matotoru rokiroki, ka ārai i te hekenga o te matotoru o te peita rapa nā te pirau o ngā whākōkī i roto i te hydroxyethyl cellulose whānui.
Ngā Āhuatanga o te Hydroxyethyl Cellulose
He pūhui wai-wai kore-ionic te hydroxyethyl cellulose ether. He paura mā, he kowhai mārama rānei e rere ngāwari ana. Kāore e rewa i roto i te nuinga o ngā whakarewa waro.
1. Ka wairewa te HEC i roto i te wai wera, i te wai matao rānei, ā, kāore e pupū ake i te pāmahana tiketike, i te kohua rānei, nā reira he whānuitia ngā āhuatanga wairewa me te matotoru, ā, kāore hoki e wera te wai.
2. Kāore i te ionic, ā, ka taea te noho tahi me ētahi atu polymer wairewa-wai, ngā surfactants, me ngā tote. He whakamātotoru colloidal pai rawa atu mō ngā otinga kei roto ngā electrolytes kukū teitei.
3. E rua ngā teitei ake o te kaha pupuri wai i tō te methyl cellulose, ā, he pai ake te whakahaere i te rere.
4. Ki te whakaritea ki te methyl cellulose me te hydroxypropyl methyl cellulose kua mōhiotia, ko te kaha marara o HEC te mea kino rawa atu, engari ko te kaha tiaki colloid te mea tino kaha (tae).
Te whakamātotoru
Pā ki te ngāwari o te mahi, pērā i: te āheinga paninga, te ātete ki te tauhiuhi, te ātete ki te ngaronga; ka taea e te hanganga whatunga motuhake o te cellulose ether te whakau i te paura i roto i te pūnaha paninga, te whakaroa i tōna whakataunga, me te whakapai ake i te pānga rokiroki o te pūnaha.
He ātete wai pai
Kia maroke rawa te kiriata peita, he tino ātete wai. E whakaatu ana tēnei i te uara o tōna ātete wai i roto i te pūnaha whakatakotoranga PVC-teitei. Mai i ngā whakatakotoranga o tāwāhi ki Haina, i roto i tēnei pūnaha PVC-teitei, ko te nui o te cellulose ether i tāpirihia he 4-6‰.
te pupuri wai pai rawa atu
Ka taea e te Hydroxyethyl cellulose te whakaroa i te wā whakaaturanga me te whakahaere i te wā maroke kia pai ake ai te hanganga kiriata; i roto i ēnei, ka tino heke te pupuri wai o te methyl cellulose me te hypromellose ki runga ake i te 40°C, ā, e whakapono ana ētahi rangahau o tāwāhi ka taea te whakaiti i tēnei mā te 50%, ka tino piki ake te tūponotanga o ngā raruraru i te raumati me te pāmahana tiketike.
He pai te pumau hei whakaiti i te rere o te peita
Whakakorehia te whakatōpuku, te whakakotahitanga me te flocculation; i taua wā, ko te hydroxyethyl cellulose ether he momo hua kore-ionic. Kāore e tauhohe ki ngā momo tāpiringa i roto i te pūnaha.
He pai te hototahi ki te pūnaha maha-tae
He tino hototahi ngā tae, ngā tae me ngā whakakī; ko te hydroxyethyl cellulose ether te mea tino pai ki te whanaketanga tae, engari i muri i te whakarerekētanga, pērā i te methyl me te ethyl, ka kitea pea he tūponotanga huna o te hototahi o ngā tae.
He pai te hototahi ki ngā momo rauemi mata
Ka taea te whakamahi i roto i ngā pūnaha whakatakotoranga paninga rerekē.
Te kaha nui o te mahi patu huakita
He pai mō ngā pūnaha silicate
Te wā tuku: Hui-tanguru-02-2023